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6. (1 pt) Which represents an ENDOTHERMIC reaction? a. 10 kJ + reactants - products b. reactants-> products + 10 kJ C reactan
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Q6) When heat is absorbed in the reaction, the reaction is called as endothermic reaction.
Option b) heat is given out, hence it is exothermic.
Option c) It is just an equilibirium
Option d) It is just the catalytic reaction
Answer is option a) where 10kJ of heat is used to give product.

Q7) The reaction where Pt is written on the reaction arrow, is the catalystic reaction. Hence answer is option d).

Q8) Double half-headed arrow represents reversible reaction.
Hence answer is option c).

Q9) a) Al(s) + 3/2 Br2(l) ----> AlBr3
The Br2 molecule is diatomic and hence 3/2 does not provide any actual number of molecules. In the balanced equation, the coeeficient need to to be integer. Hence the balanced reaction is:
2Al(s) + 3 Br2(l) ----> 2 AlBr3

b) 2N2(g) + 6H2(g) ----> 2NH3(g)
The number of N is not balanced.
the balanced reaction is:
N2(g) + 6H2(g) ----> 2NH3(g)

10) a)
3 LiOH(aq) + Fe(NO3)3(aq) ----> Fe(OH)3(s) + 3 LiNO3(aq)

b)
2 C5H12O(g) + 15 O2(g) ----> 10 CO2(g) + 12 H2O(l)

c)
2 KClO3(s) ----> 2 KCl(s) + 3 O2(g)

d) 2NH3(g) + H2SO4(aq) -----> (NH4)2SO4(aq)

e) Zn(s) + 2 HCl(aq) ----> ZnCl2(aq) + H2(g)

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